Activity:
Hot Air Balloon 

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http://education.ti.com/.../Activity.do
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Description: 
This activity provides students with a visual for adding and subtracting integers and helps students understand that subtraction can be thought of as adding the opposite. A hot air balloon begins with a certain number of helium bags (providing lift) and the same number of sand bags (providing weight). The vertical position of the hot air balloon is determined by adding or removing a number of helium bags (representing positive integers) and sand bags (representing negative integers). 
Technology Type: 
TINspire  
Author: 
Texas Instruments 
Language: 
English  
Cost: 
Does not require payment for use 

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Courses: 
Math 5 
Integers 
 Math 6 
Integers 
 Math 7 
Negative & zero, Integers 
 Algebra 
Add / Subtract 
